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I 0. L. REDFIELD. IMPRESSION DEVICE FOR MATRIX MAKING MACHINES.

No. 416,741. Patented Dec. 10, 1889.

19N440 OM20 gvwewloz UNITED STATES PATENT OFFICE.

CASPER L. REDFIELD, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR, BY MESNE ASSIGNMEN TS, TO THE CHICAGO MATRIX MACHINE COMPANY.

IMPRESSION DEVICE FOR MATRIX-MAKING MACHINES.

SPECIFICATION formingpart of Letters Patent No. 416,741, dated December 10, 1889.

Application filed. March 15, 1889.

Serial no. 303,397. (No model.)

To all whom it 12mg concern:

* Be it known that I, CASPER L. REDFIELD,a

citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Impression Devices for Matrix-Making Machines, of which the following is a specification.

My invention relates'to matrix-making machines adapted to present type-dies successively at a common point at which they are to be impressed into a matrix-body; and the object of my invention is improvement of the devices for producing the depression of the dies into the matrix material; and, generally stated, the invention consists in a reciprocating plunger and means for introducing between it and the type-die in position to be struck abody adapted to impart to the die the blow of the plunger when desired.

My improvements are illustrated in the accompanying drawings, in which- Figure 1' is a side elevation, partly sectional, of the impression devices embodying my improvements. Fig. 2 is a transverse central section of the same. Figs. 3, 4, and 5 are details of the plunger and interposed device; and Figs. 6 and 7 are plan views in detail of the devices for interposing a body between the plunger and die.

In said drawings, A is a portion of the upper part of the machine-frame, and A is the frame secured thereon to support the operative parts of the plunger device.

33 is a short upright cylinder formed in the frame A, and C is a piston therein.

D is an eccentric having the arm cl of its strap d connected to a pin (Pin a slot inthe piston, and is rotated by a shaft E, mounted on the frame A. The shaft is run by power by means of a pulley e and is provided with a fly-wheel 6. On the lower end of the piston C is a pin or plunger 0, that is thus made to reciprocate between limits determined by the extent of the throw of the eccentric-arm.

F is one of a set of type-dies in a frame f, that may be brought successively by any suitable mechanism to a position in vertical line with the plunger, but separated there- 50 from a suitable distance. 'lo impart the force of the plunger thrust to a die in position beneath it, it is necessary, as will be apparent, to interpose some body between the die and plunger. The character and form of the interposed body and the means for mov- 5'5 ing it to and from position are capable of many variations.

In the devices selected for illustration, G designates a bar of suitable lengthto pass between the plunger and die when the former is on its upstroke and to be forced upon the die by the downstroke of the plunger. The bar is held in upright position in guides in a frame H, through which it extends, by means of a spiral spring 8, that rests 011 the base of the frame H and bears against a collar g on the bar. The spring returns the bar to its normal position after the plungerthrust has been received. The frame H is M located in an opening a in the machine-frame A, and a lip h overhangs and slides upon the surface of the frame A, adjacent to the opening, to guide the frame H and prevent downward movement. To the frame H isattached an arm I, fulcrumed at its outer end '5 to a post J. On the arm I is an armature k, by means of which the arm is moved on its fulcrum by an electro-magnet K. The devices are so arranged that the movement of the armature to its magnet will carry the bar G to position directly beneath the plunger. To avoid the possibility of the plunger striking the bar G before it is in position to strike the die squarely, there is provided on the piston a pin on at the side of the plunger and of equal length with it, and on the top of the frame H a similar pin or, standing at little higher than the top of the bar G. These pins on and or should have their ends sharpened, so that the latter cannot receive the force of the downward thrust of the former, but yet be so arranged that the plunger must be some distance above the bar before the latter can reach a position to receive the plunger impact. When the bar has been moved to position to strike the die, it is held by a spring-catch 0, that engages a pin 10, carried on the collar 9 and extending upward through the top of the frame H. This catch holds the devices in place until the bar G is depressed, which causes the pin 13 to descend and slide out of engagement with the catch 0. The lever I is then free to be retracted by the spring t upon release of the armature from the magnet. 7

Any suitable means may be employed for completing an electric circuit with the magnet K at the desired moment.

Having fully described my invention, What I claim, and desire to secure by Letters Patent, 15-- 1. In a matrix-machine, a continuously-reciprocating plunger operating in guides 0pposite the printing-point, type-dies adapted to be presented successively to the printingpoint, an interponent adapted to act in conjunction With the plunger to transmit its thrusts to a die at the printing-point, a laterally-movable carrier for interposing the inter-ponent, means for operating the interpo nent-carrier, and means, substantially as described, for locking it in place during the contact of the plunger with the interponent and freeing it upon the completion of a plunger thrust.

2. In 7 a matrix-machine, a reciprocatingplunger, laterally-movable type-dies arranged to be successively presented between the plunger and printing-point, an interponent for transmitting the plunger thrusts to the dies, guards to prevent premature contact of the plunger and interponent, and a catch for holding the latter in position until the thrust of the plunger is received, and an armature and electro-mag'net for operating such interponent, substantially as set forth.

3. In a matrix-machine, a reciprocating plunger, type-dies arranged to be presented in succession to the printing-point, an interponent for transmitting plunger thrusts to the dies, guards to prevent premature contact of the plunger and interponent, a catch for holding the interponent in position while receiving the plunger thrust, a laterally' 1n0v able carrier for the interponent, and means, substantially as described, for operating the same.

CASPER L. BEDFIELD. 

